out, body language could have a bigger impact than words, and we remember al gore, george bush and jon stewart having a field day with those sighs. >> i've had a record of that in texas. >> as if the sighing weren't bad enough, gore's behavior got worse. [ laughter ] >> in that same year we remember that moment when al gore got up, walked over towards then governor bush, and this was his reaction. >> trying to get things done, and i believe i can. [ laughter ] >> famous moment. years prior there was president h.w. bush checking his watch at the debates. these have become famous moments. are these debate prep teams telling their candidates, this is what you don't do? >> at this point in time they're emphasizing style as opposed to substance right now because debates that have changed people's minds have all been about physical characteristics and mannerisms really in the modern age and not about the substance of the policy answers, so they're paying a lot of attention to the style and not the substance. >> you can almost watch the debate with the volume down and determine who wins the t